I googled a lot but I can't seem to find a clear answer on that.The Exynos 8895 spec website* says "2CA 150 Mbit/s" in Upload but does the S8 support that too?
Second Question: How do I get rid of the (european) Cat. 9 limitation of the device? What firmware do I have to flash to get Cat 16 support (without voiding knox...)?
* www . samsung.com/semiconductor/minisite/Exynos/Solution/MobileProcessor/Exynos_9_Series_8895.html (Can't post link yet).
As I just figured out, DL CAT16 and UL CAT13 only work in South Korea (MCC 450) and Australia (MCC 505). You must be on their network, just flashing the modem firmware isn't enough.
So yes, the Exynos variant supports 64QAM in UL, but we will probably never see it -- while they sold me the phone as CAT16 without mentioning CAT9 a single time.
What a joke.
FWIW: You can flash older modem firmwares (pre July) to get the service menu back (*#2683662#). Knox will not blow.
After lots of arguing with my network operator for several months they seem to have convinced SAMSUNG to enable 256 QAM DL and 64 QAM UL for the EMEA model (SM-G950f and SM-G955F). In previous versions those features definitely did not work.
I was able to verify 256 QAM DL with two operators and 64 QAM UL with three operators. The modem firmware I am on is G950FXXU1CRAP.
Related
Hey guys -
So like many of you, I reflashed my two Yotas to the latest RU Lollipop and was wondering if there was another radio firmware file that might wake up the AT&T US LTE bands. Any thoughts? Has anyone tried flashing the different radios to see if you can get a 4G LTE signal stateside?
Thanks,
Rootdude
what upload/download speed do you have now?
YotaDevicesRussia said:
what upload/download speed do you have now?
Click to expand...
Click to collapse
I have HSPA+ on AT&T . Can you help us with US modem firmware for LTE?
ivanupolo said:
I have HSPA+ on AT&T . Can you help us with US modem firmware for LTE?
Click to expand...
Click to collapse
HSPA+ can be sometimes very good - 3-15Mb/s - what is your speed at the moment? can you check through speedtest.net ?
At&t firmware
I have around 3.5 mbs to download and 0.6 uploaf. Too small comparing local 4G. So, can you help us?
I do not think you can change that easily, there's a thread talking about changing Radio Bands but the conclusion I got from the reading is that it does not work, at least with current "user" knowledge, YD206 is from China or HongKong, and some of those LTE Bands can work in Europe, not so much on the USA, the bands that USA telephone companies are very different than Europe or Asia, and as such YD206 IS NOT compatible with USA LTE bands. UMTS can have much higher upload speed than the ones you posted, so it might be your network problem, don't know if they are any better in LTE over your region.
Should be possible
Qualcomm 8974 supports all LTE bands. We just need proper modem firmware for US bands. Method in those threads definitely doesn't work since Qualcomm introduced some hidden filters inside firmware
BTW, there is lte_prefferedband file in the modem folder of Yota EFS. Does anyone know how to edit it?
That might be a anti-tampered code against our NV changes
Ok, I found out. For AT&T we need qcn file from Yotaphone 2, model 205. I don't know it such thing exist on the market but this reference says that it might be compatible with At&T.
https://www.frequencycheck.com/models/A1JaO/yota-yotaphone-2-yd205
ivanupolo said:
Ok, I found out. For AT&T we need qcn file from Yotaphone 2, model 205. I don't know it such thing exist on the market but this reference says that it might be compatible with At&T.
https://www.frequencycheck.com/models/A1JaO/yota-yotaphone-2-yd205
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Click to collapse
interesting thing is that YD205 model was never launched, so it doesn't exist at all, unfortunately. The inquiries about future developments of this model were negative...
I am using ZE520KL Taiwan version. However, my it cannot support my Canadian carrier (Koodo) LTE network. Knowing the two model pretty much have the same spec (excepting screen size and ram), I am guessing if I can manage to flash the kernel from USA/Brazil/Canada ZE520KL, then the LTE maybe work somehow?
Suggestion？ Help？
That'll just brick the phone, I'd think. That's what happened when I tried flashing the Canadian modem on my Canadian ZE552KL after flashing the WW ROM from ASUS' website.
callmebrain said:
I am using ZE520KL Taiwan version. However, my it cannot support my Canadian carrier (Koodo) LTE network. Knowing the two model pretty much have the same spec (excepting screen size and ram), I am guessing if I can manage to flash the kernel from USA/Brazil/Canada ZE520KL, then the LTE maybe work somehow?
Suggestion？ Help？
Click to expand...
Click to collapse
It won't work even it was possible to make it boot with this kernel.
Had anyone who doesnt have the Global Version tried to change the LTE Band with the Snapdragon software tools? If you haven't heard or tried this just search Unlock LTE Bands in XDA main search. Because I'm think its going to be much cheaper to by the Chinese version that is like only 343USD for 6gb of RAM and 128 ROM and unlock the bands. Any thoughts? Thanks.
Changing the bands with QPST or QXDM can be done but it has no effect on functionality.
Some software will see these bands as unlocked but the phone itself can not make use of them. You might also run into some trouble on MIUI though custom roms seem more flexible with this.
At the moment there is no way to convert a CN (band restricted) model into a Global model (no band restrictions).
Hi, somebody has any news ?
for conversion(activate ) band 20 in Xiaomi Note 2 ?
thank you
This is very important topic I think. What I find really weird that the firmware files (modem) and rom are the same no matter which version you have...
On redmi note 3, kate and kenzo have different rom and different modem files. Its really weird here.
https://www.phonemore.com/compare/p...5u-vs-samsung-galaxy-s7-edge-sm-g935a/5532054
This compares a G935U vs. a G935A
What firmware would I flash to get the features of the G935U (left picture)
I just flashed my phone with the G935U (AT&T) and although it works fine with no AT&T bloatware, it is missing
some of the GSM bands of the G935U (Left picture) and all of the CDMA bands.
Thank you,
Ken
Unless your phone is a true "U" unlocked model, it will not have the same bands as each of the specific carrier variants such as the AT&T variant. I've never confirmed if flashing a different firmware and modem (CP file) will open up other bands on a carrier branded phone. Maybe someone else has tested this and can offer their input. I tend to doubt it's possible because i think the bands are hard coded onto the chipset thus making it virtually impossible to "activate" unsupported bands on any given model. good luck.
Nope, the modem bands are not changed by the firmware flashing. I have flashed "U" firmware over my "V" phone and it still had only the "V" bands. This is similar to all Snapdragon radio modems - it happened the same way on my older moto and Asus phones too.
The bands can be software forced "on" by flashing the Qualcomm NV memory (with Qualcomm tools) but, in my experience, they will still be not be working. More, at every official upgrade, the "old" value of the NV is reset to original hardware bands.
I have flashed my 935V with 935U (AT&T) firmware and besides the no more bloatware I do
get bands LTE 12 and 30 for sure that I did not get with the 935V when in the GSM mode.
Ken
SoNic67 said:
Nope, the modem bands are not changed by the firmware flashing. I have flashed "U" firmware over my "V" phone and it still had only the "V" bands. This is similar to all Snapdragon radio modems - it happened the same way on my older moto and Asus phones too.
The bands can be software forced "on" by flashing the Qualcomm NV memory (with Qualcomm tools) but, in my experience, they will still be not be working. More, at every official upgrade, the "old" value of the NV is reset to original hardware bands.
Click to expand...
Click to collapse
I know for sure that flashing the U over V did not change the bands on my phone (not the A firmware), the NV value remained (reverted) to the original bands. Did that even after the OTA Oreo upgrade of the Nougat U version.
Cell #06828 has the value 4190 on the V version of S7.
If you use the LTE Band Calculator you will see that's 2,3,4,5,7,13.
Can you post a service screen with that working (dial *#0011#)?
LE: I stand corrected. The U firmware re-flashes the modem's CSC file with every change of the SIM. In that process it activates ONLY the bands needed for that CSC - this includes the 2G, 3G and 4G/LTE. This is unlike any other Android phone, where the bands are always the same.
There are other things affected by this file, for example the APN, or the accessibility of the Service menu (*#0011*) or the menu to view/change the LTE bands (*#2263#).
With a Tracfone/Verizon SIM, I get only the Verizon bands (except 66 that is not supported) and a couple of international ones. The flashed CSC file is TFN.
With a AT&T SIM, I get a lot more bands, including all AT&T (except 14 and 66 that's not supported) and international ones. Flashed CSC file is ATT.
With an international SIM (Vodafone), flashed CSC file is XAA.
The U firmware has available the following CSC codes: ACG, AIO, ATT, BST, GCF, LRA, SPR, TFN, TMB, TMK, USC, VMU, VZW, XAA, XAS.
More here: https://forum.xda-developers.com/ve...ge-verizon-firmware-modded-lte-bands-t3827369
This is an attempt to compile a list of differences between these devices in HW and SW area.
I have read somewhere that 5G might be different in Indian model (not supporting all channels like the 2 other devices). Is that a HW thing or SW?
Can you make an Indian model change OS to EU/ International version? Is it worth it?